Gtk::GestureDrag Class Reference

Drag gesture. More...

#include <gtkmm/gesturedrag.h>

Inheritance diagram for Gtk::GestureDrag:

Public Member Functions
	GestureDrag (GestureDrag && src) noexcept
GestureDrag &	operator= (GestureDrag && src) noexcept
	~GestureDrag () noexcept override
GtkGestureDrag *	gobj ()
	Provides access to the underlying C GObject. More...
const GtkGestureDrag *	gobj () const
	Provides access to the underlying C GObject. More...
GtkGestureDrag *	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
bool	get_start_point (double & x, double & y) const
	Gets the point where the drag started. More...
bool	get_offset (double & x, double & y) const
	Gets the offset from the start point. More...
Glib::SignalProxy< void(double, double)>	signal_drag_begin ()
Glib::SignalProxy< void(double, double)>	signal_drag_update ()
Glib::SignalProxy< void(double, double)>	signal_drag_end ()
Public Member Functions inherited from Gtk::GestureSingle
	GestureSingle (GestureSingle && src) noexcept
GestureSingle &	operator= (GestureSingle && src) noexcept
	~GestureSingle () noexcept override
GtkGestureSingle *	gobj ()
	Provides access to the underlying C GObject. More...
const GtkGestureSingle *	gobj () const
	Provides access to the underlying C GObject. More...
GtkGestureSingle *	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
bool	get_touch_only () const
	Returns true if the gesture is only triggered by touch events. More...
void	set_touch_only (bool touch_only=true)
	Sets whether to handle only touch events. More...
bool	get_exclusive () const
	Gets whether a gesture is exclusive. More...
void	set_exclusive (bool exclusive=true) const
	Sets whether gesture is exclusive. More...
unsigned int	get_button () const
	Returns the button number gesture listens for. More...
void	set_button (unsigned int button=0)
	Sets the button number gesture listens to. More...
unsigned int	get_current_button () const
	Returns the button number currently interacting with gesture, or 0 if there is none. More...
Gdk::EventSequence *	get_current_sequence ()
	Returns the event sequence currently interacting with gesture. More...
const Gdk::EventSequence *	get_current_sequence () const
	Returns the event sequence currently interacting with gesture. More...
Glib::PropertyProxy< bool >	property_touch_only ()
	Whether the gesture handles only touch events. More...
Glib::PropertyProxy_ReadOnly< bool >	property_touch_only () const
	Whether the gesture handles only touch events. More...
Glib::PropertyProxy< bool >	property_exclusive ()
	Whether the gesture is exclusive. More...
Glib::PropertyProxy_ReadOnly< bool >	property_exclusive () const
	Whether the gesture is exclusive. More...
Glib::PropertyProxy< unsigned int >	property_button ()
	Mouse button number to listen to, or 0 to listen for any button. More...
Glib::PropertyProxy_ReadOnly< unsigned int >	property_button () const
	Mouse button number to listen to, or 0 to listen for any button. More...
Public Member Functions inherited from Gtk::Gesture
	Gesture (Gesture && src) noexcept
Gesture &	operator= (Gesture && src) noexcept
	~Gesture () noexcept override
GtkGesture *	gobj ()
	Provides access to the underlying C GObject. More...
const GtkGesture *	gobj () const
	Provides access to the underlying C GObject. More...
GtkGesture *	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
Glib::RefPtr< Gdk::Device >	get_device ()
	Returns the logical Gdk::Device that is currently operating on gesture. More...
Glib::RefPtr< const Gdk::Device >	get_device () const
	Returns the logical Gdk::Device that is currently operating on gesture. More...
bool	set_state (EventSequenceState state)
	Sets the state of all sequences that gesture is currently interacting with. More...
EventSequenceState	get_sequence_state (Gdk::EventSequence * sequence) const
	Returns the sequence state, as seen by gesture. More...
bool	set_sequence_state (Gdk::EventSequence * sequence, EventSequenceState state)
	Sets the state of sequence in gesture. More...
std::vector< const Gdk::EventSequence * >	get_sequences () const
	Returns the list of Gdk::EventSequences currently being interpreted. More...
Gdk::EventSequence *	get_last_updated_sequence ()
	Returns the Gdk::EventSequence that was last updated on gesture. More...
const Gdk::EventSequence *	get_last_updated_sequence () const
	Returns the Gdk::EventSequence that was last updated on gesture. More...
bool	handles_sequence (Gdk::EventSequence * sequence) const
	Returns true if gesture is currently handling events corresponding to sequence. More...
Glib::RefPtr< Gdk::Event >	get_last_event (Gdk::EventSequence * sequence)
	Returns the last event that was processed for sequence. More...
Glib::RefPtr< const Gdk::Event >	get_last_event (Gdk::EventSequence * sequence) const
	Returns the last event that was processed for sequence. More...
bool	get_point (Gdk::EventSequence * sequence, double & x, double & y) const
	If sequence is currently being interpreted by gesture, returns true and fills in x and y with the last coordinates stored for that event sequence. More...
bool	get_bounding_box (Gdk::Rectangle & rect) const
	If there are touch sequences being currently handled by gesture, returns true and fills in rect with the bounding box containing all active touches. More...
bool	get_bounding_box_center (double & x, double & y) const
	If there are touch sequences being currently handled by gesture, returns true and fills in x and y with the center of the bounding box containing all active touches. More...
bool	is_active () const
	Returns true if the gesture is currently active. More...
bool	is_recognized () const
	Returns true if the gesture is currently recognized. More...
void	group (const Glib::RefPtr< Gesture > & group_gesture)
	Adds gesture to the same group than group_gesture. More...
void	ungroup ()
	Separates gesture into an isolated group. More...
std::vector< Glib::RefPtr< Gesture > >	get_group ()
	Returns all gestures in the group of gesture. More...
std::vector< Glib::RefPtr< const Gesture > >	get_group () const
	Returns all gestures in the group of gesture. More...
bool	is_grouped_with (const Glib::RefPtr< Gesture > & other) const
	Returns true if both gestures pertain to the same group. More...
Glib::SignalProxy< void(Gdk::EventSequence *)>	signal_begin ()
Glib::SignalProxy< void(Gdk::EventSequence *)>	signal_end ()
Glib::SignalProxy< void(Gdk::EventSequence *)>	signal_update ()
Glib::SignalProxy< void(Gdk::EventSequence *)>	signal_cancel ()
Glib::SignalProxy< void(Gdk::EventSequence *, EventSequenceState)>	signal_sequence_state_changed ()
Glib::PropertyProxy_ReadOnly< unsigned int >	property_n_points () const
	The number of touch points that trigger recognition on this gesture. More...
Public Member Functions inherited from Gtk::EventController
	EventController (EventController && src) noexcept
EventController &	operator= (EventController && src) noexcept
	~EventController () noexcept override
GtkEventController *	gobj ()
	Provides access to the underlying C GObject. More...
const GtkEventController *	gobj () const
	Provides access to the underlying C GObject. More...
GtkEventController *	gobj_copy ()
	Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs. More...
Widget *	get_widget ()
	Returns the Gtk::Widget this controller relates to. More...
const Widget *	get_widget () const
	Returns the Gtk::Widget this controller relates to. More...
void	reset ()
	Resets the controller to a clean state. More...
PropagationPhase	get_propagation_phase () const
	Gets the propagation phase at which controller handles events. More...
void	set_propagation_phase (PropagationPhase phase)
	Sets the propagation phase at which a controller handles events. More...
PropagationLimit	get_propagation_limit () const
	Gets the propagation limit of the event controller. More...
void	set_propagation_limit (PropagationLimit limit)
	Sets the event propagation limit on the event controller. More...
Glib::ustring	get_name () const
	Gets the name of controller. More...
void	set_name (const Glib::ustring & name)
	Sets a name on the controller that can be used for debugging. More...
Glib::RefPtr< const Gdk::Event >	get_current_event () const
	Returns the event that is currently being handled by the controller. More...
guint32	get_current_event_time () const
	Returns the timestamp of the event that is currently being handled by the controller. More...
Glib::RefPtr< Gdk::Device >	get_current_event_device ()
	Returns the device of the event that is currently being handled by the controller. More...
Glib::RefPtr< const Gdk::Device >	get_current_event_device () const
	Returns the event that is currently being handled by the controller. More...
Gdk::ModifierType	get_current_event_state () const
	Returns the modifier state of the event that is currently being handled by the controller. More...
Glib::PropertyProxy_ReadOnly< Widget * >	property_widget () const
	The widget receiving the Gdk::Events that the controller will handle. More...
Glib::PropertyProxy< PropagationPhase >	property_propagation_phase ()
	The propagation phase at which this controller will handle events. More...
Glib::PropertyProxy_ReadOnly< PropagationPhase >	property_propagation_phase () const
	The propagation phase at which this controller will handle events. More...
Glib::PropertyProxy< PropagationLimit >	property_propagation_limit ()
	The limit for which events this controller will handle. More...
Glib::PropertyProxy_ReadOnly< PropagationLimit >	property_propagation_limit () const
	The limit for which events this controller will handle. More...
Glib::PropertyProxy< Glib::ustring >	property_name ()
	The name for this controller, typically used for debugging purposes. More...
Glib::PropertyProxy_ReadOnly< Glib::ustring >	property_name () const
	The name for this controller, typically used for debugging purposes. More...

Static Public Member Functions
static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system. More...
static Glib::RefPtr< GestureDrag >	create ()
	Creates a Gesture that recognizes drags. More...
Static Public Member Functions inherited from Gtk::GestureSingle
static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system. More...
Static Public Member Functions inherited from Gtk::Gesture
static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system. More...
Static Public Member Functions inherited from Gtk::EventController
static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system. More...

Protected Member Functions
	GestureDrag ()
	Constructs a Gesture that recognizes drags. More...
Protected Member Functions inherited from Gtk::GestureSingle
	GestureSingle ()
	There is no create() method that corresponds to this constructor, because only derived classes shall be created. More...
Protected Member Functions inherited from Gtk::Gesture
	Gesture ()
	There is no create() method that corresponds to this constructor, because only derived classes shall be created. More...
Protected Member Functions inherited from Gtk::EventController
	EventController ()
	There is no create() method that corresponds to this constructor, because only derived classes shall be created. More...

Related Functions
(Note that these are not member functions.)
Glib::RefPtr< Gtk::GestureDrag >	wrap (GtkGestureDrag * object, bool take_copy=false)
	A Glib::wrap() method for this object. More...
Related Functions inherited from Gtk::GestureSingle
Glib::RefPtr< Gtk::GestureSingle >	wrap (GtkGestureSingle * object, bool take_copy=false)
	A Glib::wrap() method for this object. More...
Related Functions inherited from Gtk::Gesture
Glib::RefPtr< Gtk::Gesture >	wrap (GtkGesture * object, bool take_copy=false)
	A Glib::wrap() method for this object. More...
Related Functions inherited from Gtk::EventController
Glib::RefPtr< Gtk::EventController >	wrap (GtkEventController * object, bool take_copy=false)
	A Glib::wrap() method for this object. More...

Detailed Description

Drag gesture.

This is a Gesture implementation that recognizes drag operations. The drag operation itself can be tracked through signal_drag_begin(), signal_drag_update() and signal_drag_end(), or the relevant coordinates be extracted through get_offset() and get_start_point().

Since gtkmm 3.14:

Constructor & Destructor Documentation

GestureDrag() [1/2]

Gtk::GestureDrag::GestureDrag ( GestureDrag &&  src )

noexcept

~GestureDrag()

Gtk::GestureDrag::~GestureDrag ( )

overridenoexcept

GestureDrag() [2/2]

Gtk::GestureDrag::GestureDrag ( )

protected

Constructs a Gesture that recognizes drags.

Member Function Documentation

create()

static Glib::RefPtr< GestureDrag > Gtk::GestureDrag::create ( )

static

Creates a Gesture that recognizes drags.

Since gtkmm 3.14:

Returns

A RefPtr to a new GestureDrag.

get_offset()

bool Gtk::GestureDrag::get_offset	(	double &	x,
		double &	y
	)		const

Gets the offset from the start point.

If the gesture is active, this function returns true and fills in x and y with the coordinates of the current point, as an offset to the starting drag point.

Parameters

x	X offset for the current point.
y	Y offset for the current point.

Returns

true if the gesture is active.

get_start_point()

bool Gtk::GestureDrag::get_start_point	(	double &	x,
		double &	y
	)		const

Gets the point where the drag started.

If the gesture is active, this function returns true and fills in x and y with the drag start coordinates, in widget-relative coordinates.

Parameters

x	X coordinate for the drag start point.
y	Y coordinate for the drag start point.

Returns

true if the gesture is active.

get_type()

static GType Gtk::GestureDrag::get_type ( )

static

Get the GType for this class, for use with the underlying GObject type system.

gobj() [1/2]

GtkGestureDrag * Gtk::GestureDrag::gobj ( )

inline

Provides access to the underlying C GObject.

gobj() [2/2]

const GtkGestureDrag * Gtk::GestureDrag::gobj ( ) const

inline

Provides access to the underlying C GObject.

gobj_copy()

GtkGestureDrag * Gtk::GestureDrag::gobj_copy

(

)

Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

operator=()

GestureDrag & Gtk::GestureDrag::operator= ( GestureDrag &&  src )

noexcept

signal_drag_begin()

Glib::SignalProxy< void(double, double)> Gtk::GestureDrag::signal_drag_begin

(

)

Slot Prototype:

void on_my_drag_begin(double start_x, double start_y)

Flags: Run Last

Emitted whenever dragging starts.

Parameters

start_x	X coordinate, relative to the widget allocation.
start_y	Y coordinate, relative to the widget allocation.

signal_drag_end()

Glib::SignalProxy< void(double, double)> Gtk::GestureDrag::signal_drag_end

(

)

Slot Prototype:

void on_my_drag_end(double offset_x, double offset_y)

Flags: Run Last

Emitted whenever the dragging is finished.

Parameters

offset_x	X offset, relative to the start point.
offset_y	Y offset, relative to the start point.

signal_drag_update()

Glib::SignalProxy< void(double, double)> Gtk::GestureDrag::signal_drag_update

(

)

Slot Prototype:

void on_my_drag_update(double offset_x, double offset_y)

Flags: Run Last

Emitted whenever the dragging point moves.

Parameters

offset_x	X offset, relative to the start point.
offset_y	Y offset, relative to the start point.

Friends And Related Function Documentation

wrap()

Glib::RefPtr< Gtk::GestureDrag > wrap ( GtkGestureDrag *  object, bool  take_copy = false  )

related

A Glib::wrap() method for this object.

Parameters

object	The C instance.
take_copy	False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns

A C++ instance that wraps this C instance.